I have a calcium reactor in my reef aquarium which i run only at day time, this to prevent pH to get to low at night.
The co2 is controlled via a solenoid.
I have a pH probe in the aquarium and one in the calcium reactor

Is it possible to get an alarm if the pH is to high in the calcium reactor at daytime ?
That would suggest that my co2 bottle is empty.

In the nighttime i would like to get an alarm if the pH in the calcium reactor is to low, is that possible ?
That would suggest that there is a problem with the solenoid or the outlet socket.

I have noticesd the nocturnal chane function.
But the transition of the pH in the calcium reactor from night to day and reverse is gradualy not instant.

ANd alarm connected with a timer would be nice, but not available as i can see ?